Light for its output, weak in heat
The Longi Solar Monocrystalline 144 series consists of 144-cell modules designed to minimize energy losses and operate more stably under partial shading. The use of half-cut technology in combination with PERC monocrystalline cells improves the module's performance in real-world conditions - when shadows from chimneys, trees, or dirt only cover a portion of the surface. Another noteworthy feature is the intelligent soldering, which supports even current flow and increases resistance to micro-cracks during transport and installation.
In practice, this series addresses common issues with rooftop and commercial installations - fluctuations in power output in low light, power drops due to uneven sun exposure, and compatibility requirements with modern inverters. These modules also feature gallium-doped technology, which limits LID degradation, resulting in more predictable performance over a longer period. This makes them a good choice for prosumers, businesses, and farms that want higher yields in challenging conditions and guaranteed performance for years to come.
Ranking
Signals from the data
Residential, commercial and shaded-installations.
Hot climates and owners who want a long output guarantee.
Top 16% of the PERC 500-550 W segment, against a median of 53.0.
Top 20% of the PERC 500-550 W segment, against a median of 20.90%.
Bottom 1% of the PERC 500-550 W segment, against a median of -0.350. Ranked 13,879th in the whole database.
Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs.
The 20.7-21.5% efficiency range places this series above comparable 144 half-cut modules in the 530-550 Wp class, such as IBC Solar 182M (21.28%), Goldi Solar GS10-B144-TF (21.3%), and Jetion JT SGh (21.3%).
Longi's gallium-doped silicon technology, developed with Shin-Etsu, cuts light-induced degradation from a typical ~0.6%/year for PERC down to around 0.45%/year, resulting in roughly 11-12% total power loss over 25 years versus higher rates typical of older P-type modules.
The half-cut architecture with 144 half-cells lowers resistive losses and improves module behavior under partial shading (e.g., from a chimney or tree), which matters for rooftop installations with uneven sun exposure.
LONGi Solar has consistently held BloombergNEF Tier 1 status (confirmed in Q1 and Q2 2026), which supports non-recourse bank financing for commercial and utility-scale PV projects. The company has been operating since 2000.
The applied soldering process supports even current flow between cells and increases module resistance to microcracks arising during transport and installation, meaningfully lowering the risk of premature power degradation.
Launched in 2019, this series was phased out of production in 2023 - availability of new units, service support, and spare parts is limited, as LONGi has shifted focus to newer product lines (including the Hi-MO series with HPBC technology).
PERC was the standard when this series launched, but current market leaders - including LONGi itself with HPBC cells reaching 28.13% efficiency - now offer higher efficiency and often longer power warranties than the standard 25 years featured in this series, worth weighing against current tier-1 offerings.
- Efficiency of 21.1% matches the PERC 500-550W median
- At 208.9 W/m² power density, roof space requirements are typical for PERC 500-550W panels
- At -0.47%/°C, loses 0.12pp more power per degree than PERC 500-550W median (-0.35%/°C)
- 27.0 kg weight - 1.4 kg lighter than PERC 500-550W median (28.4 kg), reducing installation effort
- #9297 for efficiency, #13879 for temperature performance out of 14005 panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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